Ariel Winter goes blonde, flaunts her booty for secret photoshoot

The 18-year-old actress shared a photo of herself sporting a short blond wig and bright red lipstick on Wednesday, but once again, it's her racy outfit that has people talking. Winter donned a black bodysuit and red high heels under a sheer tulle skirt, striking a sexy pose for her 2.4 million Instagram followers.

While we're unsure of Winter's secret project, one thing we do know for sure is that she's currently single. Last week, she shut down rumors that she's been dating longtime pal Sterling Beaumon. "Everyone thinking I'm taken when I'm just over here like hi I'm single AF," she tweeted.

ET caught up with the Modern Family star last month, when she opened up about her Instagram posts and promoting a positive body image.

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Ariel Winter's sexiest Instagrams of 2016

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Ariel Winter's sexiest Instagrams of 2016

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Getting ready for @glamourmag's Women of the Year LIVE summit! #glamourWOTY see you soon;)

Couldn't be more grateful to @shanelle_gray & @davidbarrygray for throwing me the most amazing graduation party ever last night...the amount of love and support they've shown me for the past four years has been life changing. My sister is my absolute best friend and my everything...❤️ Thank you so much. I couldn't be luckier or more grateful. I was in awe last night and I still am that you guys love me that much to do all of that for me...I never would be where I am today without you two...you guys saved me and taught me to be the person I am today. Dad...I love you!!! Thank you for always being there to support and love me as well and always put a smile on my face no matter what :). I'm so grateful for the bond we now share. Alenah the song you put together with Shanelle and recorded for me was one of the most special gifts I've ever received. I'm still tearing up thinking about it. Thank you for that and for your beautiful, special performance. Also a big thank you so much to Geraldine for putting it all together and to @contemporarycatering @robpauerful for the most amazing food! A special thank you as well to Sharon who is probably the biggest reason I was able to get through high school and accepted into college...you pushed me to always do my best and encouraged me...not to mention you were always there for my 1am freak outs about late projects :) Anddddd thank you SO MUCH to all of my amazing family members and friends that flew in to celebrate with us- you guys are the absolute best. Thank you also to the ones who didn't have to fly in...so much love was felt all around last night. Thank you thank you thank you!!!!!! Class of 2016...❤️ #uclabound

I don't know who made this of me but....yaaaassss 👏🏽👏🏽👏🏽

Hello UCLA, 4s up 😌 #graduation

Hands up if you're feelin' yourself today too 🙋🏽🙋🏽🙋🏽🙋🏽 #friday

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Found a hedgehog on #set this morning 🙂

Boo you whore 🖕🏼#meangirls #cosmo #blonde

Actual day 1 with Burt ❤️ #film #set #dogyears

Me + Burt = Dog Years
Go see it 👊🏼👌🏼ALSO: Peep Brian in the back throwin' some serious shade. Just sayin'.

Might ride some 🐴 today 😛 #dayoff

📸 @jennessarose

Senior #prom #2016 :) Hair// @charles_dujic
Makeup// @kipzachary

Happy Sunday ♠️

#ootd

#modernfamily #atas #event

I've got sexy ladies 🎼 #coachella ❤️

#coachella #2016 #baby 📷@jessiebergg

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"I don't really think I'm telling myself, 'You should post this, you shouldn't post that,' I feel like I'm just having fun," Winter told ET. "Everybody is so hyped up on the fact that I post photos where my butt's out. It's a butt. Everyone has a butt. I don't think it's crazy."